Re: IP Address Variable?

[Hal Burgiss <hal foobox net>]

On Wed, Jul 31, 2002 at 02:37:16AM -0000, Joe Giles wrote:
> Is there a preset variable in Linux that stores your IP address?
> 
> I use DHCP, and I would like to use an IP variable (If one exists) to set my DISPLAY option... Can anyone help ?
> 
> Example
> 
> display=$MYIP:0;export display
> 
> There $MYIP would be the actual Linux variable to export...

#!/bin/sh
# 
## Extracts the current IP from ifconfig.
#
## usage: MY_IP=`my_ip` (with back quotes)
#
#######################################################################
#
#WAN_IFACE=ppp0
WAN_IFACE=eth0                       #WAN Interface

# make sure the interface is up to start with ...
if ifconfig | grep $WAN_IFACE >/dev/null 2>&1 && 
   ifconfig $WAN_IFACE |grep UP >/dev/null; then 

 # extract just our desired IP ... 
 ifconfig $WAN_IFACE | grep inet | cut -d : -f 2 | cut -d \  -f 1
 exit $?

fi

exit 1

#--- eof my_ip

In your case, you might add:

 else

   echo localhost

===========

 ... just in case.


-- 
Hal Burgiss